Resident Evil 0 Unlockables Guide: Leech Hunter, Wesker Mode, and Unlimited Ammo

Resident Evil 0 unlockables are some of the strangest bonus rewards in the classic series, and a surprising number of players finish the campaign without ever knowing they exist. The good news is that most of them open up the second the credits roll for the first time — no special difficulty, no speedrun, no perfect ranking required. The catch is that the best of the resident evil 0 unlockables, unlimited ammo, sits behind a bonus mode that punishes anyone who walks in unprepared. This guide breaks down everything that can be earned, how to earn it, and the fastest route to each reward.

Resident Evil 0 Unlockables: The Full List at a Glance

Resident Evil 0 launched on the GameCube in 2002 and returned in 2016 as an HD remaster for PC, PlayStation, Xbox, and later Switch. The two versions don't carry identical extras, but they follow the same design philosophy: clear the story once, and the bonus menu wakes up. Capcom's official Resident Evil portal is the best place to confirm which version you're playing before you start chasing rewards.

One reality check for anyone coming from the first Resident Evil: RE0's base campaign weapon list is fixed. You find what the game hands you and nothing more, which is exactly why Leech Hunter matters. It's the only dependable way to boost your firepower on a repeat playthrough.

How to Unlock Leech Hunter

Leech Hunter is the headline bonus mode, and it's refreshingly simple to reach. There's no hidden trigger, no collectible hunt in the main story, and no requirement to finish under a time limit.

The mode drops you back into the Training Facility with a fixed loadout and asks you to gather 100 leeches — 50 green and 50 blue. Zombies, hunters, and leech monsters roam the halls, and supplies are deliberately thin. Because you're alone, the Partner Zapping safety net is gone: there's nobody to cover a doorway while you search a shelf.

Community reports consistently describe Leech Hunter as a routing puzzle rather than a firefight. Enemies are obstacles to walk around, not targets to clear, and the players who finish it fastest are usually the ones who fire the fewest bullets.

Leech Hunter Reward Tiers: What Your Score Actually Gets You

Rewards are calculated from the total number of leeches you're holding when you end a run. The tiers aren't explained anywhere in-game, so the player community has documented them over the years. The widely reported structure looks like this:

Exact item names vary between the original release and the remaster, but the shape of the ladder doesn't. Missing a threshold drops you to the tier below it, so it always pays to grab a few extra leeches before you head for the exit.

The tier that matters to almost everyone is the last one. Banking all 100 leeches is what turns a tense campaign into a victory lap, and the bonus carries over to the main game once you save. If you're sitting at 90-something and the run is still alive, don't cash out — backtrack and sweep the rooms you skipped.

Wesker Mode and the HD Remaster Extras

The 2016 remaster added the biggest shake-up to the bonus lineup: Wesker Mode. Like Leech Hunter, it unlocks after you finish the main story once, but it changes the campaign itself rather than adding a side mode.

This isn't a costume swap. Wesker's mobility genuinely rewrites encounters — the hunters and leech creatures that stall new players become speed bumps. Most platforms also tie an achievement or trophy to finishing the mode, which makes it a natural cleanup step after you've already seen the story.

The remaster also bundles cosmetic outfits for both leads depending on your platform and region, with Rebecca's nurse-style costume being the best known of the set. These are visual only and have no effect on difficulty or rewards. Worth noting: Wesker Mode and the costume bonuses are remaster features, so GameCube veterans won't find them in the original release.

Tips for Unlocking Everything Faster

Unlocking the full set is a matter of order and preparation. Player experience suggests the following priorities:

A few extra habits help:

• Plan your item drops. RE0 famously has no item boxes, so anything you leave on the floor stays there. Build small caches in rooms you'll pass through repeatedly instead of hauling everything with you.
• Treat your first Leech Hunter attempt as reconnaissance. A failed run costs you nothing but time, and knowing which corridors connect to which rooms is worth more than any weapon.
• Keep the right save file. Community reports suggest the bonuses apply to the clear file you earned them on, so don't overwrite it if you plan to replay.
• Don't skip the Easy playthrough. If your only goal is unlocking modes, a fast Easy run gets you to Leech Hunter and Wesker Mode in the shortest possible time.

Once unlimited ammo is active, a fresh playthrough becomes the best way to mop up leftover achievements, experiment with weapons you ignored the first time, and enjoy the Train and Training Facility sections without inventory anxiety.

FAQ

Do you have to beat Resident Evil 0 on Hard to unlock Leech Hunter?

No. Leech Hunter unlocks after clearing the main story on any difficulty, including Easy. Difficulty settings don't gate any of the resident evil 0 unlockables, so there's no reason to punish yourself on a first run if you're only after bonus content.

Which unlockable should I chase first?

Go for Leech Hunter, then push for the 100-leech tier. Unlimited ammo makes everything else easier, including a Wesker Mode clear and any leftover achievements. The bonus costumes and gallery-style extras are cosmetic, so they can wait.

Is Wesker Mode in the original GameCube version?

No. Wesker Mode was added in the 2016 HD remaster and isn't present in the 2002 GameCube release. If you're playing the original, Leech Hunter and its reward tiers are effectively your entire bonus suite.

How long does it take to collect all 100 leeches?

It depends entirely on how well you know the Training Facility. Most players report that a clean sweep fits comfortably into a single sitting once the map is memorized, while the first few attempts are spent learning routes, enemy placements, and which leeches are worth risking a fight for.